Evaluation of Indented Prestressing Wires for KDOT Bridge Members

Most pretensioned concrete members in the United States utilize 7-wire prestressing strands that are at least 3/8-inch diameter. However, individual indented prestressing wires have been commonly used in Europe and Asia for more than 20 years and are becoming increasingly popular in the United States. In the past 11 years, Kansas State University has conducted over $3.5 million of USDOT/Federal Railroad Administration (FRA) funded research aimed at understanding the bonding and structural performance of these reinforcements, so that they can now be utilized correctly in their intended application. This research had led to the development of a new ASTM standard to evaluate the bond of these wires (ASTM A1096), an automated non-contact transfer length measurement device, a non-contact wire indent profiler, and a new Splitting Resistance Test (SRT) that was officially adopted into the AREMA Design manual in 2021. The objective of this research is to: Investigate opportunities to utilize indented prestressing wires in KDOT bridge members to optimize designs efficiency and safety. A secondary benefit of using these wires is to establish alternate suppliers of prestressing steel to protect against disruptions in the supply chain.

Language

• English

Project

• Status: Active
• Funding: $59615
• Contract Numbers:

  KSU-23-3

  RE-0860-01

  C2205

• Sponsor Organizations:

  Kansas Department of Transportation

  Eisenhower State Office Building
  700 SW Harrison Street
  Topeka, KS  United States  66603-3754
• Performing Organizations:

  Kansas State University Transportation Center

  Kansas State University
  Department of Civil Engineering
  Manhattan, KS  United States  66506
• Principal Investigators:

  Peterman, Robert

• Start Date: 20220808
• Expected Completion Date: 20231130
• Actual Completion Date: 0

Subject/Index Terms

• TRT Terms: Bridge members; Pretensioning; Reinforced concrete bridges; State departments of transportation; Wire
• Geographic Terms: Kansas
• Subject Areas: Bridges and other structures; Design; Highways; Materials;

Filing Info

• Accession Number: 01858603
• Record Type: Research project
• Source Agency: Kansas Department of Transportation
• Contract Numbers: KSU-23-3, RE-0860-01, C2205
• Files: RIP, STATEDOT
• Created Date: Sep 22 2022 11:08AM